Examine source code of Inverted Iris

{
  "theme": {
    "images": {
      "theme_frame": "irismissouriensisinverse.jpg"
    },
    "colors": {
      "frame": "#7d4391",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Inverted Iris",
  "manifest_version": 2,
  "description": "Native wildflower Iris missouriensis- colors inverted. A nice purple skin."
}